Prof. Roman Oliynykov is a cryptographer, blockchain researcher, and professor at V.N.Karazin Kharkiv National University. He graduated from the Kharkiv National University of Radioelectronics in Ukraine with expertise in Computer Engineering and Cybersecurity, and after further research activity, got his Ph.D. and Dr. Habil. degrees in cryptology. His professional experience includes the development and security analysis of decentralized consensus protocols, zk-based cryptographic protocols, tokenomics for cryptocurrencies, and the development of cryptographic primitives, including Ukrainian cryptographic standards: the Kalyna block cipher (DSTU 7624:2014) and the Kupyna hash function (DSTU 7564:2014). He recently led projects on analyses of voting schemes for blockchains and cryptographic protocols for such schemes. His teaching disciplines include software and network security, general crypto, and cryptocurrencies. He was also involved in the training of Ukrainian cyber police officers.